Integral anvil holder

ABSTRACT

AN ANVIL CONSTRUCTION FOR A TOOL FOR SETTING FASTENERS WITH ANVIL HAVING A PAIR OF DIAMETRICALLY OPPOSED FLATS FOR CLEARANCE PURPOSES AND INCLUDING MEANS FOR ATTACHING THE ANVIL TO THE TOOL WHEREBY THE ANVIL CAN BE ROTATED TO MOVE THE FLATS INTO ANY DESIRED POSITION.

Sept. 20, 1971 P, R, CHlRCO 3,605,478

INTEGRAL ANVIL HOLDER Filed Sept. 9, 1968 INVENTOR.

E27-Z6?? 6751/'60 K FIVEYJ'.

United States Patent O1 hee 3,605,478 INTEGRAL ANV IL HOLDER Peter R. Chirco, Utica, Mich., assignor to Huck Manufacturing Company, Detroit, Mich. Filed Sept. 9, 1968, Ser. No. 758,468 Int. Cl. B21d 9/05 U.S. Cl. 72-391 9 Claims ABSTRACT F THE DISCLOSURE An anvil construction for a tool for setting fasteners with the anvil having a pair of diametrically opposed flats for clearance purposes and including means for attaching the anvil to the tool whereby the anvil can be rotated to move the ats into any desired position.

SUMMARY BACKGROUND OF THE INVENTION The present invention relates to tools for setting fasteners and more particularly to a novel anvil construction for such tools.

In prior anvil construction in tolls for setting twopiece fasteners diametrically opposed flats are located on the outside surface of the anvil to permit use of the tool in applications having limited clearance. In prior constructions (see patent to Van Hecke et al., No. 3,107,806, issued Oct. 22, 1963) the anvil is held to the body of the tool by means of an integral locking lug on the anvil which engages into a bayonet type locking groove in the body of the tool. With this type of assembly the flats are located at a fixed position. In many instances it would be desirable to have the clearance ilats at a different location. With prior constructions this could be done only by the use of a dilerent anvil having flats at the different desired location. In the present invention a construction is provided in which the anvil is rotatable 360"V such that the clearance flats can be located in any desired angular position.

Therefore, it is an object of the present invention to provide an improved tool construction for setting fasteners.

It is another object of the present invention to provide for an improved anvil construction for tools for setting fasteners.

It is another object of the present invention to provide an anvil construction for use with tools for setting fasteners in which the anvil has a pair of diametrically opposed clearance flats and is of a construction whereby it can be rotated to move the clearance flats in various positions.

Other objects, features, and advantages of the present invention will become apparent from the subsequent description and the appended claims, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a longitudinal sectional view of a nose assembly including the anvil construction embodying features of the present invention;

FIG. 2 is a view of the assembly of FIG. 1 taken generally along the lines 2-2; and

FIG. 3 is a sectional view of the assembly of FIG. 1 taken generally along the lines 3 3.

Looking now to FIG. 1, a pull gun assembly is generally indicated by the numeral and includes a nose assembly 12 and a gun assembly 11. The gun assembly 11 can be of a conventional type such as that described in the patent to L. C. Huck, No. 2,132,112, and is capable of applying a relative axial force for setting twopiece fasteners.

Patented Sept. 20, 1971 The nose assembly 12 comprises a generally tubularly shaped anvil member 20 having an axially extending bore 21. The anvil member 20 is secured to the end of the casing of the gun assembly 11 by means to be described. The end of the anvil 20 adjacent the gun member 11 is open while the opposite or forward end is substantially closed by an anvil portion 24 having a centrally disposed bore or aperture 26 located therein, which aperture performs a swaging operation in a manner known in the art. A collet assembly 23 is located in the anvil 20 land includes a generally tubular collet member 25 which is slidably disposed in bore 21 in the outer vanvil 24. A generally tubular collar ejector member 28 is located at the outer end of collet 25 and is movable into the swaging bore 26. A retaining ring 30 holds the ejector member 28 between the anvil 20 and collet 25; ring 30 is engageable with the forward face of the collet member 25 to provide an ejection function whereby the set fastener can be ejected from the anvil bore 2.6. The rearward end of the ejector 28 located within collet 25 engages the forward face of a plurality of chuck jaws 32, which function in a manner known in the art, to grip the pin of the fastener whereby a relative axial force can be -applied to the fastener. The rearward faces of the chuck jaws 32 engage a generally annular cap 34 which cooperates with the jaws 32 to maintain them generally open when the apparatus is as shown in FIG. 1. The cap 34 is in turn engaged by a tubular spindleshaped follower member 36 which engages the cap 34 via an annular O-ring member `40. The follower 36 and cap 34, and hence the jaws 32, are maintained in a -forward position as shown by la plurality of O-rings 42 which are located upon a tubular sleeve member 44 vwhich is adapted to reciprocate within the follower member 36. The O-rings 42 are resiliently compressed between a flange 46 at the rearward end of sleeve 44 and a spacer member 48 which is in engagement with the rearward end of the follower 36. The rearward end of the collet 25 has internal threads 50 whereby it can be threadably secured to the rod end 52 of a piston associated with the tool assembly 11. j

As can be seen in FIG. 2, the anvil 20 is provided with a pair of diametrically opposed flats 52. These ats are provided for purposes of clearance. It is desirable that the clearance ats 52 be movable to various angular positions to accommodate different clearance requirements. To permit variation in the position of the ats 52, the collet 25 is provided with an annular groove 54 in which is located a locking or retaining split ring 56. The split ring 56 is formed preferably from a resilient spring-like material with a radial through slot 58 of sufficient width such that the ring 56 can be radially expanded over the anvil 20 and into the groove 54. The ring 56 has a pair of diametrically opposed radially outwardly extending lugs 60 which can be located in groove 62 formed at the end of a tool 'assembly 11 and releasably locked therein by lock and release assembly 63. The lugs 60 and groove f62 can define a bayonet type lock with groove 62 extending for 360, axially extending notches 65 are formed at diametrically opposite ends of groove 62 and are adapted to receive the lugs 60, whereby the lugs 60 can be introduced into the groove 62. The assembly 63 includes a plunger .67 resiliently urged into blocking position in one of the notches 65 via spring 71 whereby the lugs 60 can be inserted in groove 62 by depressing plunger 67 rearwardly in the one notch 65 and rotating anvil 20 until the lugs 60 are out of line from the notches 65, plunger 67 then moves back into its blocking position to retain the anvil 20 in the groove 62. A cross pin 69 retains the plunger 67 in the one notch 65. Note that with the construction as shown the spaans d anvil.20 can readily be rotated such that the diametri- "n'd' with the 'rotation of sdanvii memset' locating said cally opposed lflats 52 can be oriented in substantiallya...

Vsuch that maximum clearance could be provided for ap- K proximately 360. In some constructions only one ilat such at ilat 52 is used; in these constructions substantially 360 of rotation of anvil 20 is required to provide clearance for substantially 360. The present invention provides selected clearance for 360" regardless of whether f one or two flats are present.

While it will be apparent thatthe preferred embodiments of the invention disclosed `are well calculated to fulll the` objects above stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoiued claims.

What is claimed is:

1. In a hydraulically operated piston actuated tool for setting fasteners, an outer anvil member, mounting means for securing said outer anvil member to the remainder of the tool with said outer anvil member being relatively rotatable to selected angular positions for at least 90 relative to the remainder of the tool, a collet assembly located within said outer anvil member for reciprocation by the piston, said mounting means including irst connecting means for connecting said mounting means to said remainder of the tool and second connecting means, independent of said rst connecting means, for connecting said mounting means to said anvilmember for relative rotation.

2. The tool of claim 1 with said outer anvil member being relatively rotatable for substantially 360.

3. In a tool for setting fasteners an outer anvil member, mounting means for securing said outer anvil member to the remainder of the tool with said outer anvil member being relatively rotatable to selected angular positions for at least 90 relative to the remainder of the tool, with said anvil member having an axially extending clearance dat tlatinsaid angular positions...

4. The tool of claim 3 with said mounting means comprising a ring rotatably secured to said anvil and With said ring including securing means for iisredly securing said ring to the remainder of the tool.

5. The tool of claim 4 with said ring being radially split and located in a groove in said anvil.

`6. The tool of claim 5`with said'securirg means being a pair of radially outwardly extending lugs adapted to be located in a retaining'groovein the remainder of the tool.

7. The tool of claim 4 with said outer anvil member being relatively rotatable for substantially 360.

8. In a tool for setting fasteners, a nose assembly secured to the remainder of the tool for use in setting fasteners, said nose assembly comprising an outer anvil supported in a tubular body, means securing said Vtubular body of said outer anvil to the remainder of the tool, said means comprising a split ring located in a groove in said tubular body and being separable and removable from said tubular body whereby said split ring can be readily replaced, said means further comprising a pair of radially outwardly extending lugs-on said split ring and a pair of slots on said remainder of the tool with said lugs and said slots dening a bayonet type connection.

9. In a tool for setting Vfasteners a' nose assembly secured to the remainder of the tool for use in setting fasteners, said nose assembly comprising an outer anvil, means non-threadably securing said outer anvil for rotational movement relative to the remainder of the tool, said means being separable and removable from said anvil, said means comprising a split ring locatedin a groove in said anvil, said means including a pair of lugs on said split ring, and a pair of slots co-operating with said groove to permit entry of said split ring on said groove.

. References Cited UNITED STATES PATENTS 2,641,378 6/1953 Wilt 72-lll4 3,033,410 5/l1962 Hanneman 72-391 3,107,806 10/1963 Van Hecke 72--391 3,157,305 11/1964 Baugh 72-391 3,254,522 6/1966 Elliott 72-391 3,446,509 5/ 1969 -COlOSimo 72-391 CHARLES W. LANHAM, Primary Examiner G. P. CROSBY, Assistant `Examiner 

